2131113021 has 4 divisors (see below), whose sum is σ = 2841484032. Its totient is φ = 1420742012.

The previous prime is 2131112999. The next prime is 2131113059. The reversal of 2131113021 is 1203111312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2131113021 - 2¹⁵ = 2131080253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131113121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355185501 + ... + 355185506.

It is an arithmetic number, because the mean of its divisors is an integer number (710371008).

Almost surely, 2^2131113021 is an apocalyptic number.

It is an amenable number.

2131113021 is a deficient number, since it is larger than the sum of its proper divisors (710371011).

2131113021 is an equidigital number, since it uses as much as digits as its factorization.

2131113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710371010.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2131113021 is about 46163.9796919633. The cubic root of 2131113021 is about 1286.8724227835.

Adding to 2131113021 its reverse (1203111312), we get a palindrome (3334224333).

The spelling of 2131113021 in words is "two billion, one hundred thirty-one million, one hundred thirteen thousand, twenty-one".